d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Allow to create swap zone larger than v_page_count / 2.

Browse Source 
If user configured the maxswapzone tunable, just take the literal
value for the initial zone sizing attempt.  Before, it was only
possible to reduce the zone by the tunable.

While there, correct the message which was not correct when zone
creation rounded the size up.

Reported by:	jmg
Reviewed by:	markj
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential revision:	https://reviews.freebsd.org/D18381
This commit is contained in:
kib 2018-12-01 16:50:12 +00:00
parent df0eed217c
commit 58c3cabfa8
1 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
sys/vm/swap_pager.c
View File

@ -547,12 +547,12 @@ swap_pager_swap_init(void)
mtx_unlock(&pbuf_mtx);
/*
* Initialize our zone, guessing on the number we need based
* on the number of pages in the system.
* Initialize our zone, taking the user's requested size or
* estimating the number we need based on the number of pages
* in the system.
*/
n = vm_cnt.v_page_count / 2;
if (maxswzone && n > maxswzone / sizeof(struct swblk))
n = maxswzone / sizeof(struct swblk);
n = maxswzone != 0 ? maxswzone / sizeof(struct swblk) :
vm_cnt.v_page_count / 2;
swpctrie_zone = uma_zcreate("swpctrie", pctrie_node_size(), NULL, NULL,
pctrie_zone_init, NULL, UMA_ALIGN_PTR, UMA_ZONE_VM);
if (swpctrie_zone == NULL)
@ -580,7 +580,7 @@ swap_pager_swap_init(void)
n = uma_zone_get_max(swblk_zone);
if (n < n2)
printf("Swap blk zone entries reduced from %lu to %lu.\n",
printf("Swap blk zone entries changed from %lu to %lu.\n",
n2, n);
swap_maxpages = n * SWAP_META_PAGES;
swzone = n * sizeof(struct swblk);